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                <div class="text">脱发病原</div>
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                THE 3D HAIRLINE PROJECT
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                人群均有可能存在精神压力大、熬夜，同时有吸烟、喝酒、爱吃辛辣油腻等不良生活习惯。因为现代社会生活节奏加快，作息不规律， 饮食不健康等问题导致脱发速度会整体加快。
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                从初脱到晚脱一般 3-5 年不等（发质好、头发粗壮的人群，可能会延缓脱发速度）。
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                <div class="text">脱发早期症状</div>
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                头发由粗变细，由硬变软，日渐缺少光泽，并伴随头屑增多，头皮瘙痒、油腻发亮。并且额角发际线后移或头顶日渐稀疏，更有甚者两种情况同时发生。
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                <div class="text">脱发中期症状</div>
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                脱发情况日益加重，进入狂脱阶段，此时脱发速度加快，一般 3 个月至 6 个月时间达到三到四级脱发，发际线后移严重或头璇处头皮清晰可见，后移发际线与稀疏头顶相连接。
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                <div class="text">脱发晚期症状</div>
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                脱发情况无法得到良好控制，向后枕部蔓延，达到 5-6 级脱发脱发部位毛囊完全或大部分呈现闭合状态，最终脱发情况趋于稳定达到脱发稳定期， 即脱发区域基本定型，脱发速度缓慢。
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                    <div class="text">雄性激素脱发</div>
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                    ANDROGEN ALOPECIA
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                    <strong>定义：</strong>
                    一般多发于体内雄性激素分泌过多，或者对雄性激素的敏感性过强的人群。
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                    <strong>症状：</strong>
                    雄性激素性脱发也常伴有头皮大量出油的情况发生，与脂溢性脱发表征极为相似，但脂溢性脱发人群是油渍性头皮......
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                    <strong>诱因：</strong>
                    此类人群头皮中双氢睾酮(DHT)的水平比正常人要高。双氢睾酮(DHT)是人体内正常分泌的雄性激素睾酮......
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                    <div class="text">产后脱发</div>
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                    POSTPARTUM HAIR LOSS
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                    <strong>定义：</strong>
                    产后脱发，医学上又叫做“分娩性脱发”，是指妇女在生产之后头发大量或异常脱落。
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                    <strong>症状：</strong>
                    一般胎次越多，脱发越严重。据统计，约 35%-40%的妇女产后有不同程度的脱发现象......
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                    <strong>诱因：</strong>
                    1.激素水平：怀孕期间体内激素水平不稳，体内激素水平的高低直接影响头发的更换速度，雌激素增多......
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                    <div class="text">化学性脱发</div>
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                    CHEMICAL ALOPECIA
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                    <strong>定义：</strong>
                    化学性脱发是病人接受药物治疗，长期使用某些化学制剂及化学性物品而导致的脱发。
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                    <strong>诱因：</strong>
                    烫发剂、染发剂等美发产品也是引起脱发的常见原因。
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                    <div class="text">精神性脱发</div>
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                    PSYCHOTIC ALOPECIA
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                    <strong>定义：</strong>
                    精神性脱发是因精神压力过大从而导致的脱发。
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                    <strong>症状：</strong>
                    因精神压力太大，人体立毛肌收缩，头发直立，头皮组织肌肉层收缩引起充血，血流量不畅......
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                    <strong>诱因：</strong>
                    从精神性脱发的病因我们不难看出，精神性脱发和个人情绪的关系是密不可分的。精神紧张、忧郁......
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                    <div class="text">脂溢性脱发</div>
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                    SEBORRHEIC ALOPECIA
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                    <strong>定义：</strong>
                    由于皮脂腺分泌油脂过多堵塞毛囊导致的一种脱发类型
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                    <strong>症状：</strong>
                    常伴有头皮油腻，头屑增多及瘙痒等症状，严重者会导致脂溢性皮炎、头部毛囊炎......
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                    <strong>诱因：</strong>
                    长期压力过大，脑力劳动过度，熬夜并睡眠不足，长期吃辛辣、油腻食物，维生素微量元素缺乏......
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                    <div class="text">遗传性脱发</div>
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                    HEREDITARY ALOPECIA
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                    <strong>定义：</strong>
                    遗传性脱发其实遗传的是毛囊的特性，有些人毛囊天生存在缺陷,更容易受到雄性激素......
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                    <strong>症状：</strong>
                    遗传性脱发的部分人群也有头皮分泌油脂极少的情况。出油多才会导致遗传性脱发的......
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                    <strong>诱因：</strong>
                    孩童时期雄性激素分泌较少，等到成年后,雄性激素分泌增多，开始刺激这部分缺陷的毛囊，导致毛囊萎缩脱发......
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                    <div class="text">斑秃</div>
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                    ALOPECIA AREATA
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                    <strong>定义：</strong>
                    斑秃和雄性激素性脱发是完全不同机理的一种脱发形式。斑秃又叫圆形脱发，俗称鬼剃头。
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                    <strong>症状：</strong>
                    斑秃是短时间内，头发毫无征兆地整簇整簇的不规则脱落。严重者会由一块块的斑秃掉成全秃......
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                    <strong>诱因：</strong>
                    斑秃是一种自身免疫性皮肤病，是由于自身免疫力急剧下降或免疫系统对部分毛囊产生了排斥......
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                    <div class="text">物理性脱发</div>
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                    PHYSICAL ALOPECIA
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                    <strong>定义：</strong>
                    物理性脱发主要是指物理性因素对头皮产生的刺激和损伤，从而导致局部或整体掉发现象。
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                    <strong>症状：</strong>
                    头发直接受到拉力，像京剧演员及女运动员，为演出和比赛 常把头发往后拉，并用丝带或橡皮筋紧紧扎起来......
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                    <strong>诱因：</strong>
                    物理性脱发主要是由于外界灼伤、放射性辐射、机械性摩擦等物理原因而导致的脱发。
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